Roline 19-inch shelf 1U 350 T 50 kg gray. The fixed-install shelves can be easily mounted on the four 19" profile rails of your 19" network or server cabinet. They are made of sturdy, perforated sheet metal and have a load capacity of up to 50 kg, making them an ideal storage space for components that are not 19"-mountable. The mounting rails can be adjusted if necessary.